Display device

ABSTRACT

A display device includes a display panel including a first area including a peripheral region and an emission region of a pixel of a first group; and a second area including a peripheral region and an emission region of a pixel of a second group; at least one insulating layer disposed on the display panel and overlapping the second area; an organic layer disposed on the at least one insulating layer and overlapping the second area; and a light blocking pattern disposed on the organic layer and overlapping the second area. A first opening corresponding to the emission region of the pixel of the second group is formed in the organic layer, and a first light blocking opening corresponding to the first opening is formed in the light blocking pattern.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This is a continuation application of U.S. Pat. Application No.17/461,023, filed Aug. 30, 2021 (now pending), the disclosure of whichis incorporated herein by reference in its entirety. U.S. Pat.Application No. 17/461,023 claims priority to and the benefit of KoreanPatent Application No. 10-2020-0188156 under 35 U.S.C. § 119, filed onDec. 30, 2020, in the Korean Intellectual Property Office (KIPO), theentire contents of which are incorporated herein by reference.

BACKGROUND

Embodiments of the disclosure described herein relate to a displaydevice, and more specifically, relate to a display device capable ofoperating in two modes.

Electronic devices such as smart phones, tablets, notebook computers,car navigation systems and smart televisions have been developed. Theseelectronic devices include a display device to provide information.

A user requests an image of a quality suitable for usage situation. Forexample, outside a building affected by natural light, the user demandsa brighter image. For example, in an electronic device in which personalinformation is viewed, the user requests an image with a narrow viewingangle.

SUMMARY

Embodiments of the disclosure provide a display device capable ofproviding an image that meets needs of a user.

According to an embodiment of the disclosure, a display device mayinclude a display panel, at least one insulating layer, an organiclayer, and a light blocking pattern. The display panel may include afirst area including a peripheral region and an emission region of apixel of a first group, and a second area including a peripheral regionand an emission region of a pixel of a second group. The at least oneinsulating layer may be disposed on the display panel and overlaps thesecond area. The organic layer may be disposed on the at least oneinsulating layer and overlaps the second area. The light blockingpattern may be disposed on the organic layer and overlaps the secondarea. A first opening corresponding to the emission region of the pixelof the second group may be defined in the organic layer. A first lightblocking opening corresponding to the first opening may be formed in thelight blocking pattern.

According to and embodiment, a first stacked structure may be formed onthe display panel and overlap the first area, and a second stackedstructure may be formed on the display panel and overlap the secondarea, and a cross sectional stacked structure of the first stackedstructure and a cross sectional stacked structure of the second stackedstructure may be different from each other.

According to and embodiment, the display device may further include anorganic pattern disposed on the display panel, overlapping the firstarea, and not overlapping the second area.

According to and embodiment, the at least one insulating layer mayoverlap the first area, the organic layer may overlap the first area,and the light blocking pattern may not overlap the first area.

According to and embodiment, the display panel may include a thinencapsulation layer overlapping light emitting elements of the pixel ofthe first group and the pixel of the second group, and the thinencapsulation layer may include a first encapsulation inorganic layer,an organic layer disposed on the first encapsulation inorganic layer,and a second encapsulation inorganic layer disposed on the organiclayer.

According to and embodiment, the display device may further include atleast one inorganic layer disposed between the second encapsulationinorganic layer and the organic pattern.

According to and embodiment, a thickness of the organic pattern may beabout 30,000 Å or less.

According to and embodiment, the at least one insulating layer mayinclude a first inorganic layer, a second inorganic layer disposed onthe first inorganic layer, and an organic layer disposed on the secondinorganic layer. The organic pattern may be disposed between the firstinorganic layer and the second inorganic layer.

According to and embodiment, the display panel may deactivate the pixelof the first group and may activate the pixel of the second group in afirst operation mode, and the display panel may activate the pixel ofthe first group and the pixel of the second group in a second operationmode.

According to and embodiment, the pixel of the first group may include afirst color pixel, a second color pixel, and a third color pixel thatgenerate different lights from one another, and the pixel of the secondgroup may include a first color pixel, a second color pixel, and a thirdcolor pixel that generate different lights from one another.

According to and embodiment, each of the first area and the second areamay include a plurality of unit regions, the first color pixel, thesecond color pixel, and the third color pixel may be disposed in each ofthe plurality of unit regions, and the first color pixel, the secondcolor pixel, and the third color pixel in the first group and the firstcolor pixel, the second color pixel, and the third color pixel in thesecond group may have a same arrangement.

According to and embodiment, the display device may further include aplanarization layer overlapping the first area and the second area andfilling the first opening.

According to and embodiment, a refractive index of the planarizationlayer may be greater than a refractive index of the organic layer.

According to and embodiment, the planarization layer may overlap thelight blocking pattern.

According to and embodiment, the organic layer may include an inclinedsurface defining the first opening, and the inclined surface and anupper surface of the at least one insulating layer exposed to the firstopening may meet at an obtuse angle.

According to and embodiment, the display device may further include aninput sensor to detect an external input. The input sensor may include aconductive mesh line overlapping the peripheral region and defining asensor opening corresponding to the emission region, and the conductivemesh line may be disposed on the at least one insulating layer andoverlap by the organic layer.

According to and embodiment, the at least one insulating layer mayinclude a first inorganic layer and a second inorganic layer disposed onthe first inorganic layer, the conductive mesh line may include a firstsensing electrode and sensing patterns insulated from the first sensingelectrode, and the input sensor may include a bridge pattern whichelectrically connects the sensing patterns and overlaps the firstsensing electrode. The bridge pattern may be disposed between the firstinorganic layer and the second inorganic layer.

According to and embodiment, the organic layer may include a secondopening corresponding to the emission region of the pixel of the firstgroup, and a depth of the second opening may be smaller than a depth ofthe first opening.

According to an embodiment, a display device may include a display panelincluding a first area including emission regions of a first group, anda second area including emission regions of a second group, an inputsensor disposed on the display panel, and an optical control layerdisposed on the input sensor. The input sensor may include at least oneinsulating layer on the display panel, an organic pattern overlappingthe first area and not overlapping the second area, a conductive meshline disposed on the at least one insulating layer and the organicpattern and defining a plurality of sensor openings corresponding to theemission region of the first group and the emission region of the secondgroup, and an organic layer overlapping the conductive mesh line andincluding openings corresponding to the emission regions of the secondgroup. The optical control layer may include a light blocking patterndisposed on the organic layer, not overlapping the first area, andoverlapping the second area, the light blocking pattern including lightblocking openings corresponding to the openings of the organic layer,and a planarization layer overlapping the first area and second area,filling the openings, and having a higher refractive index than arefractive index of the organic layer.

According to an embodiment, a pixel of the first group and a pixel ofthe second group may have a same pixel arrangement.

According to an embodiment, the organic layer may include an inclinedsurface defining a corresponding first opening among the openings, andthe inclined surface and an upper surface of the at least one insulatinglayer exposed to the corresponding first opening among the openings maymeet at an obtuse angle.

According to an embodiment, a thickness of the organic pattern may beabout 30,000 Å or less.

According to an embodiment, a display device may include a display panelincluding a first area in which a pixel of a first group deactivated ina first operation mode and activated in a second operation mode isarranged, and a second area in which a pixel of a second group activatedin the first operation mode and the second operation mode is arranged,an organic pattern disposed on the display panel, overlapping a lightemitting element of the pixel of the first group, and not overlapping alight emitting element of the pixel of the second group, and an organiclayer disposed on the organic pattern, the organic layer including anopening corresponding to the light emitting element of the pixel of thesecond group.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects and features of the disclosure will becomeapparent by describing in detail embodiments thereof with reference tothe accompanying drawings.

FIGS. 1A to 1C are schematic perspective views of a display deviceaccording to an embodiment of the disclosure;

FIG. 2 is a schematic cross-sectional view of a display device accordingto an embodiment of the disclosure;

FIG. 3 is a schematic plan view of an input sensor according to anembodiment of the disclosure;

FIGS. 4A to 4C are schematic enlarged plan views corresponding to apartial area AA of FIG. 3 ;

FIG. 4D is a schematic plan view illustrating a pixel activated in afirst operation mode;

FIG. 4E is a schematic plan view illustrating a pixel activated in asecond operation mode;

FIG. 5 is a schematic cross-sectional view of a display panel accordingto an embodiment of the disclosure;

FIG. 6A is a schematic cross-sectional view taken along line I-I′ ofFIGS. 4A and 4C of a display device according to an embodiment of thedisclosure;

FIG. 6B is a schematic cross-sectional view taken along line II-II′ ofFIGS. 4B and 4C of a display device according to an embodiment of thedisclosure;

FIG. 7 is a schematic graph showing a front luminance depending on athickness of an organic layer according to an embodiment of thedisclosure;

FIG. 8A is a schematic graph showing luminance for each of viewingangles of a display devices according to Comparative Examples anddisplay devices according to Embodiments of the disclosure;

FIG. 8B is a schematic graph showing color deviations for each ofviewing angles of a display device according to a material of aninsulating layer;

FIG. 8C is a schematic graph showing color deviations according toviewing angles of display devices according to Comparative Examples anddisplay devices according to Embodiments of the disclosure;

FIG. 9 is a schematic cross-sectional view taken along line II-II′ ofFIG. 4B of a display device according to an embodiment of thedisclosure; and

FIG. 10 is a schematic cross-sectional view taken along line I-I′ ofFIG. 4A of a display device according to an embodiment of thedisclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In the specification, when one component (or area, layer, part, or thelike) is referred to as being “on,” “connected to,” or “coupled to”another component, it should be understood that the former may bedirectly on, connected to, or coupled to the latter, and also may be on,connected to, or coupled to the latter via a third interveningcomponent.

Like reference numerals refer to like components. Also, in drawings, thethickness, ratio, and dimension of components may be exaggerated foreffectiveness of description of technical contents. The term “and/or”includes one or more combinations of the associated listed items.

The terms “first,” “second,” and the like are used to describe variouscomponents, but the components are not limited by the terms. The termsare used only to differentiate one component from another component. Forexample, a first component may be named as a second component, and viceversa, without departing from the spirit or scope of the disclosure. Asingular form, unless otherwise stated, includes a plural form.

Also, the terms “under,” “beneath,” “on,” and “above” are used todescribe a relationship between components illustrated in a drawing. Theterms are relative and are described with reference to a directionindicated in the drawing.

It will be understood that the terms “include,” “comprise,” “have,” etc.specify the presence of features, numbers, steps, operations, elements,or components, described in the specification, or a combination thereof,not precluding the presence or additional possibility of one or moreother features, numbers, steps, operations, elements, or components or acombination thereof.

The terms “about” or “approximately” as used herein is inclusive of thestated value and means within an acceptable range of deviation for theparticular value as determined by one of ordinary skill in the art,considering the measurement in question and the error associated withmeasurement of the particular quantity (i.e., the limitations of themeasurement system). For example, “about” may mean within one or morestandard deviations, or within ± 30%, 20%, 10%, 5% of the stated value.

The phrase “at least one of” is intended to include the meaning of “atleast one selected from the group of” for the purpose of its meaning andinterpretation. For example, “at least one of A and B” may be understoodto mean “A, B, or A and B.”

Unless otherwise defined or implied herein, all terms (includingtechnical and scientific terms) used herein have the same meaning ascommonly understood by one of ordinary skill in the art to which thisdisclosure pertains. It will be further understood that terms, such asthose defined in commonly used dictionaries, should be interpreted ashaving a meaning that is consistent with their meaning in the context ofthe relevant art and the disclosure, and should not be interpreted in anideal or excessively formal sense unless clearly so defined herein.

Hereinafter, embodiments of the disclosure will be described withreference to the drawings.

FIGS. 1A to 1C are schematic perspective views of a display device DDaccording to an embodiment.

As illustrated in FIGS. 1A to 1C, a display surface DD-IS is parallel toa plane defined by a first direction axis DR1 and a second directionaxis DR2. A third direction axis DR3 indicates a perpendicular directionto the display surface DD-IS, for example, a thickness direction of thedisplay device DD. A front surface (or an upper surface) and a rearsurface (or a lower surface) of each member are distinguished based onthe third direction axis DR3. Hereinafter, first to third directions aredirections indicated by the first to third direction axes DR1, DR2, andDR3, respectively, and refer to the same reference numerals.

As illustrated in FIGS. 1A to 1C, the display surface DD-IS includes adisplay area DD-DA in which an image IM is displayed, and a non-displayarea DD-NDA adjacent to the display area DD-DA. The non-display areaDD-NDA is an area in which an image is not displayed. FIGS. 1A to 1Cillustrate icon images as an example of the image IM. As an example, thedisplay area DD-DA may have a rectangular shape. The non-display areaDD-NDA may surround the display area DD-DA. However, the disclosure isnot limited thereto, and a shape of the display area DD-DA and a shapeof the non-display area DD-NDA may be modified.

As illustrated in FIGS. 1A to 1C, the display device DD may includeareas defined depending on an operation type. The display device DD mayinclude a folding area FA that is folded on the basis of a folding axisFX, a first flat area NFA1 and a second flat area NFA2 that are adjacentto the folding area FA. The folding area FA is an area thatsubstantially forms a curvature.

In the embodiment, the display device DD in which the folding axis FXparallel to the first direction DR1 is defined is illustrated as anexample. However, the disclosure is not limited thereto, and the foldingaxis FX may be parallel to the second direction DR2.

As illustrated in FIG. 1B, the display device DD may be in-folded orin-bent such that the display surface DD-IS of the first flat area NFA1and the display surface DD-IS of the second flat area NFA2 face eachother. As illustrated in FIG. 1C, the display device DD may beout-folded or out-bent such that the display surface DD-IS is exposed tothe outside.

In an embodiment, the display device DD may include folding areas FA.The folding area FA may be defined to correspond to a form in which auser manipulates the display device DD. For example, the folding area FAmay be defined in a diagonal direction crossing the first direction axisDR1 and the second direction axis DR2 in a plan view. The area of thefolding area FA may not be fixed and may be determined depending on aradius of curvature. In an embodiment, the display device DD may beconfigured to repeat only an operation mode shown in FIGS. 1A and 1B, ormay be configured to repeat only an operation mode shown in FIGS. 1A and1C.

In this embodiment, the display device DD applied to a mobile phone isillustrated, but the disclosure is not limited thereto. In anembodiment, the display device DD may be applied to a small andmedium-sized electronic device such as a tablet PC, a car navigationsystem, a game console, and a smartwatch in addition to a largeelectronic device such as a television and a monitor.

The display device DD according to the disclosure is not limited to afoldable display device. In an embodiment, the display device DD may bea non-foldable display device or a rollable display device.

FIG. 2 is a schematic cross-sectional view of the display device DDaccording to an embodiment. FIG. 2 illustrates a cross section definedby the first direction axis DR1 and the third direction axis DR3. FIG. 2simply illustrates the display device DD to explain a stacked structureof functional panels and/or functional units constituting the displaydevice DD.

The display device DD according to an embodiment may include a displaypanel DP, an input sensor ISL, an optical control layer PPL, and awindow WP. In an embodiment, the input sensor ISL may be omitted.

According to an embodiment, at least some components of the displaypanel DP, the input sensor ISL, the optical control layer PPL, and thewindow WP may be formed by a successive process, or at least somecomponents thereof may be bonded to one another by an adhesive layer.The adhesive layer may not be disposed between the components formed bythe successive process. In this embodiment, the adhesive layer may be apressure sensitive adhesive (PSA) film. The adhesive layer describedbelow may include a general adhesive or pressure-sensitive adhesive, andis not particularly limited.

The display panel DP generates an image. The display panel DP includespixels. Each of the pixels includes a display element and a drivingcircuit which controls an operation of the display element. The drivingcircuit may include at least one transistor and a capacitor.

The display panel DP may include an image area DP-PA (refer to FIG. 4A)corresponding to the display area DD-DA and a non-image areacorresponding to the non-display area DD-NDA (not shown).

The display panel DP according to an embodiment may be a light emittingdisplay panel including a light emitting element as the display element,and is not particularly limited. For example, the display panel DP maybe an organic light emitting display panel or an inorganic lightemitting display panel. An emission layer of the organic light emittingdisplay panel may include an organic light emitting material. Anemission layer of the inorganic light emitting display panel may includea quantum dot, a quantum rod, or an inorganic LED. Hereinafter, thedisplay panel DP will be described as an organic light emitting displaypanel.

The input sensor ISL is disposed on the display panel DP. The inputsensor ISL obtains coordinate information of an external input (e.g., atouch event). The input sensor ISL may detect the external input by acapacitive method.

The optical control layer PPL may control a path of light (hereinafterreferred to as a “source light”) generated by the display panel DP. Theoptical control layer PPL may condense or concentrate light generated ina partial area of the display panel DP. The optical control layer PPLmay further spread the light generated in the partial area of thedisplay panel DP.

The optical control layer PPL may reduce reflectance of natural light(or sunlight) incident from an upper side of the window WP. The opticalcontrol layer PPL according to an embodiment may include a lightblocking pattern. The optical control layer PPL according to anembodiment may include color filters. The color filters have anarrangement. The arrangement of the color filters may be determined inconsideration of emission colors of pixels included in the display panelDP.

The window WP according to an embodiment may include a base layer (notshown) and a bezel layer (not shown). The base layer may have amultilayer structure. The base layer may include an organic substrate ora synthetic resin film.

The bezel layer partially overlaps the base layer. The bezel layer maydefine a bezel area of the display device DD, for example, thenon-display area DD-NDA (refer to FIGS. 1A and 1C). In an embodiment,the bezel layer may be disposed in a different configuration (e.g., theoptical control layer PPL).

Although not shown in the drawings, a protective member may be furtherdisposed under the display panel DP. The protection member supports thedisplay panel DP and protects the display panel DP from external impact.

FIG. 3 is a schematic plan view of the input sensor ISL according to anembodiment. FIGS. 4A to 4C are schematic enlarged plan viewscorresponding to area AA of FIG. 3 . FIG. 4D is a schematic plan viewillustrating a pixel activated in a first operation mode. FIG. 4E is aschematic plan view illustrating a pixel activated in a second operationmode.

As shown in FIG. 3 , the input sensor ISL includes a sensing area IS-DAand a non-sensing area IS-NDA adjacent to the sensing area IS-DA. Thesensing area IS-DA and the non-sensing area IS-NDA correspond to thedisplay area DD-DA and the non-display area DD-NDA shown in FIG. 1A,respectively.

First electrodes E1-1 to E1-5 and second electrodes E2-1 to E2-4 aredisposed to cross one another and to be insulated from one another inthe sensing area IS-DA. First signal lines SL1 electrically connected tothe first electrodes E1-1 to E1-5 and second signal lines SL2electrically connected to the second electrodes E2-1 to E2-4 aredisposed in the non-sensing area IS-NDA. One of the first signal linesSL1 and the second signal lines SL2 transmits a transmission signal fordetecting an external input from an external circuit to thecorresponding electrodes thereto, and another thereof transmits a changein capacitance between the first electrodes E1-1 to E1-5 and the secondelectrodes E2-1 to E2-4 to the external circuit as a received signal.

Conductive mesh lines defining sensor openings of the first electrodesE1-1 to E1-5 and the second electrodes E2-1 to E2-4 may be provided. Theconductive mesh lines may be cut to form the first electrodes E1-1 toE1-5 having an integral shape. The conductive mesh lines may be cut toform sensing patterns SP of the second electrodes E2-1 to E2-4. Thesensing patterns SP of the second electrodes E2-1 to E2-4 and the firstelectrodes E1-1 to E1-5 are disposed on the same layer and may have thesame stack structure.

Bridge patterns BR are disposed on a layer different from a layerforming the first electrodes E1-1 to E1-5. Each of the bridge patternsBR electrically connects two adjacent sensing patterns SP in the firstdirection DR1. The corresponding sensing pattern SP and thecorresponding bridge pattern BR are electrically connected to each otherthrough a contact hole TH penetrating an insulating layer (e.g., a thirdinsulating layer IS-IL3 of FIGS. 6A and 6B) disposed between the sensingpatterns SP and the bridge patterns BR. In FIG. 3 , the input sensorISL, in which two bridge patterns BR are disposed in each crossingregion of the first electrodes E1-1 to E1-5 and the second electrodesE2-1 to E2-4, is illustrated as an example.

For the clarity of description, in FIGS. 4A to 4C, components forming(or constituting) the display device DD are divided and illustrated. Aplanar shape and arrangement of the components constituting the displaydevice DD will be described in detail with reference to FIGS. 4A to 4C.

FIGS. 4A and 4B illustrate emission regions PXA-R, PXA-G1, PXA-G2, andPXA-B and a peripheral region NPXA disposed in the image area DP-PA. Theperipheral region NPXA sets a boundary between the emission regionsPXA-R, PXA-G1, PXA-G2, and PXA-B. Each of the emission regions PXA-R,PXA-G1, PXA-G2, and PXA-B corresponds to an emission region PXAdescribed with reference to FIG. 5 .

A pixel is disposed in each of the emission regions PXA-R, PXA-G1,PXA-G2, and PXA-B. A light emitting element OLED (refer to FIG. 5 ) ofthe pixel is disposed in each of the emission regions PXA-R, PXA-G1,PXA-G2, and PXA-B. A driving circuit of pixels is disposed in theperipheral region NPXA. The driving circuit of the pixels may overlapthe corresponding emission regions PXA-R, PXA-G1, PXA-G2, and PXA-B.

Hereinafter, for convenience of description, an arrangement of pixels isdefined as being the same as an arrangement of the emission regions, andactivation of the emission regions is defined as having the same meaningas activation of the pixels.

The emission regions PXA-R, PXA-G1, PXA-G2, and PXA-B may define pixelrows PXL-1 to PXL-8 extending in the second direction DR2 (or a rowdirection). The pixel rows PXL-1 to PXL-8 are arranged in the firstdirection DR1 (or a column direction).

The emission regions PXA-R, PXA-G1, PXA-G2, and PXA-B may include afirst color emission region PXA-R for generating a first color, a secondcolor emission region PXA-B for generating a second color, and thirdcolor emission regions PXA-G1 and PXA-G2 for generating a third color.In the embodiment, two types of third color emission regions PXA-G1 andPXA-G2 having different shapes in a plan view are illustrated, but thedisclosure not limited thereto. In an embodiment, a type of the thirdcolor emission regions may be applied.

In the embodiment, the first color emission region PXA-R may generatered light, the second color emission region PXA-B may generate bluelight, and the third color emission regions PXA-G1 and PXA-G2 maygenerate green light. However, the disclosure is not limited thereto.The color of lights emitted by the first color emission region PXA-R,the second color emission region PXA-B, and the third color emissionregions PXA-G1 and PXA-G2 may be selected as a combination of threecolor lights that are capable of being mixed to generate white colorlight.

In the embodiment, the first color emission region PXA-R, the secondcolor emission region PXA-B, and the third color emission regions PXA-G1and PXA-G2 having different areas in a plan view are illustrated as anexample, but the disclosure is not limited thereto. Among the emissionregions, the area of the second color emission region PXA-B is shown tobe the largest, and the area of each of the third color emission regionsPXA-G1 and PXA-G2 is the smallest, but it is only an example.

Emission regions PXA-R, PXA-G1, PXA-G2, and PXA-B, or pixels may bedivided into two groups. As described below, emission regions of a firstgroup are deactivated in a first operation mode and activated in asecond operation mode. Emission regions of a second group are activatedin each of the first operation mode and the second operation mode. Thefirst operation mode and the second operation mode may be set by auser’s selection.

Referring to FIGS. 4A and 4B, the image area DP-PA may include a firstarea PA1 in which emission regions PXA-1 of the first group are disposedand a second area PA2 in which emission regions PXA-2 of the secondgroup is disposed. As shown in FIG. 4A, emission regions PXA-1 of thefirst group are disposed in the first area PA1, and the peripheralregion NPXA adjacent to the emission regions PXA-1 is disposed. In FIG.4A, hatching represents an organic pattern ORP overlapping the firstarea PA1 and not overlapping the second area PA2.

As illustrated in FIG. 4B, emission regions PXA-2 of the second groupare disposed in the second area PA2, and the peripheral region NPXAadjacent to the emission regions PXA-2 is disposed. Substantially, adivision between the first area PA1 and the second area PA2 may bedetermined by a light blocking pattern BM. As illustrated in FIG. 4B,the light blocking pattern BM disposed in the second area PA2 isindicated by hatching, and an outer edge of the light blocking patternBM may correspond to a boundary between the first area PA1 and thesecond area PA2. In an embodiment, the light blocking pattern BM mayoverlap the adjacent organic pattern ORP. Even in such a case, the firstarea PA1 and the second area PA2 are divided by the outer edge of thelight blocking pattern BM.

As shown in FIG. 4A, the first area PA1 includes unit areas UA1. Toseparately illustrate the organic pattern ORP to correspond to the unitareas UA1, FIG. 4A illustrates a dotted line extending in the seconddirection DR2.

As shown in FIG. 4B, the second area PA2 may also include unit areasUA2. One of the light blocking patterns BM may be disposed to correspondto a unit area UA2. The first color emission region PXA-R, the secondcolor emission region PXA-B, and the two third emission regions PXA-G1and PXA-G2 are disposed in each of the unit area UA1 of the first areaPA1 and the unit area UA2 of the second area PA2.

In the unit area UA1 of the first area PA1 and the unit area UA2 of thesecond area PA2, the emission region PXA-1 of the first group and theemission region PXA-2 of the second group may have the same arrangement(or the same pixel arrangement). In the light blocking pattern BMcorresponding to the unit area UA2 of the second area PA2, lightblocking openings BM-OP corresponding to the one first color emissionregion PXA-R, the one second color emission region PXA-B, and the twothird color emission regions PXA-G1 and PXA-G2 may be defined,respectively. Each of the light blocking openings BM-OP may have an arealarger than that of the corresponding emission region.

FIG. 4C illustrates a mesh line MSL disposed in the peripheral regionNPXA. The mesh line MSL may include a first mesh line MSL1 extending ina first crossing direction and a second mesh line MSL2 extending in asecond crossing direction.

The mesh line MSL may define sensor openings MSL-OP corresponding to theemission regions PXA-R, PXA-G1, PXA-G2, and PXA-B. Each of the sensoropenings MSL-OP may have an area larger than that of a correspondingemission region among the emission regions PXA-R, PXA-G1, PXA-G2, andPXA-B. Each of the sensor openings MSL-OP may have an area larger thanthat of a corresponding light blocking opening among the light blockingopenings BM-OP illustrated in FIGS. 4A and 4B.

FIG. 4C illustrates openings PPL-OP disposed in the second area PA2 ofan organic layer PPL-1. The openings PPL-OP correspond to the emissionregions PXA-R, PXA-G1, PXA-G2, and PXA-B, respectively. The openingsPPL-OP of the organic layer PPL-1 may have an area smaller than that ofa corresponding light blocking opening among the light blocking openingsBM-OP illustrated in FIG. 4A.

Referring to FIG. 4D, in the first operation mode, the emission regionPXA-1 of the first group is deactivated (or not activated), and theemission region PXA-2 of the second group is activated. The activatedemission region PXA-2 of the second group is filled with hatching, andthe deactivated emission region PXA-1 of the first group is emptied andindicated only by a dotted line.

In the first operation mode, the display device DD generates an imageonly in the emission region PXA-2 of the second group. The imagegenerated in the first operation mode is provided with a narrow viewingangle. A detailed description thereof will be made below.

Referring to FIG. 4E, in the second operation mode, both the emissionregion PXA-1 of the first group and the emission region PXA-2 of thesecond group are activated. This operation is substantially the same asthat of a general display device. In the second operation mode, theemission region PXA-1 of the first group still provides light in anarrow range. The emission region PXA-2 of the second group may providelight in a wider range than that of the emission region PXA-1 of thefirst group. A detailed description thereof will be made below.

FIG. 5 is a schematic cross-sectional view of the display panel DPaccording to an embodiment. FIG. 6A is a schematic cross-sectional viewtaken along line I-I′ of FIGS. 4A and 4C of the display device DDaccording to an embodiment. FIG. 6B is a schematic cross-sectional viewtaken along line II-II′ of FIGS. 4B and 4C of the display device DDaccording to an embodiment.

An emission region PXA shown in FIG. 5 may correspond to one of theemission regions PXA-R, PXA-G1, PXA-G2, and PXA-B shown in FIG. 4A. Thedisplay panel DP may include a base layer BL, a circuit device layerDP-CL, a display device layer DP-OLED, and an upper insulating layerTFL. A stacked structure of the display panel DP is not particularlylimited thereto.

Referring to FIG. 5 , the display panel DP may include insulatinglayers, a semiconductor pattern, a conductive pattern, and a signalline. An insulating layer, a semiconductor layer, and a conductive layerare formed by a method such as coating or vapor deposition. Thereafter,the insulating layer, the semiconductor layer, and the conductive layermay be selectively patterned by photolithography and etching. In thisway, the semiconductor pattern, the conductive pattern, the signal line,and the like included in the circuit device layer DP-CL and the displaydevice layer DP-OLED are formed.

The base layer BL may include a synthetic resin film. The base layer BLmay include a glass substrate, a metal substrate, or anorganic/inorganic composite material substrate.

At least one inorganic layer is disposed on an upper surface of the baselayer BL. A buffer layer BFL improves a bonding force between the baselayer BL and the semiconductor pattern. The buffer layer BFL may includea silicon oxide layer and a silicon nitride layer. The silicon oxidelayer and the silicon nitride layer may be alternately stacked.

The semiconductor pattern is disposed on the buffer layer BFL. Thesemiconductor pattern may include polysilicon. However, the disclosureis not limited thereto, and the semiconductor pattern may includeamorphous silicon or metal oxide.

FIG. 5 only illustrates some semiconductor patterns, and semiconductorpatterns may be further disposed to correspond to the emission regionsPXA-R, PXA-G1, PXA-G2, and PXA-B (refer to FIG. 4A) in a plan view. Thesemiconductor pattern may be arranged in a specific rule throughout theemission regions PXA-R, PXA-G1, PXA-G2, and PXA-B. The semiconductorpattern has different electrical properties depending on whether it isdoped or not doped with impurities. The semiconductor pattern mayinclude a first area having a high doping concentration and a secondarea having a low doping concentration. The first area may be doped withan N-type dopant or a P-type dopant. A P-type transistor includes afirst area doped with a P-type dopant.

The first area has higher conductivity than that of the second area andsubstantially functions as an electrode or a signal line. The secondarea substantially corresponds to an active (or channel) of thetransistor. For example, a part of the semiconductor pattern may be anactive of the transistor, another part thereof may be a source or drainof the transistor, and another part thereof may be a conductive region.

As shown in FIG. 5 , a source S1, an active A1, and a drain D1 of atransistor T1 are formed from a semiconductor pattern. FIG. 5illustrates a part of a signal transmission region SCL formed from asemiconductor pattern. Although not shown separately in the drawings,the signal transmission region SCL may be connected to the drain D1 ofthe transistor T1 in a plan view.

First to sixth insulating layers 10 to 60 are disposed on the bufferlayer BFL. Each of the first to sixth insulating layers 10 to 60 may bean inorganic layer or an organic layer. A gate G1 may be disposed on thefirst insulating layer 10. An upper electrode UE may be disposed on thesecond insulating layer 20. A first connection electrode CNE1 may bedisposed on the third insulating layer 30. The first connectionelectrode CNE1 may be electrically connected to the signal transmissionregion SCL through a contact hole CNT-1 penetrating the first to thirdinsulating layers 10 to 30. A second connection electrode CNE2 may bedisposed on the fifth insulating layer 50. The second connectionelectrode CNE2 may be electrically connected to the first connectionelectrode CNE1 through a contact hole CNT-2 penetrating the fourthinsulating layer 40 and the fifth insulating layer 50.

The light emitting element OLED is disposed on the sixth insulatinglayer 60. A first electrode AE is disposed on the sixth insulating layer60. The first electrode AE is electrically connected to the secondconnection electrode CNE2 through a contact hole CNT-3 penetratingthrough the sixth insulating layer 60. An opening OP is defined in apixel defining layer PDL. The opening OP exposes at least a portion ofthe first electrode AE. Substantially, the emission region PXA may bedefined to correspond to a partial region of the first electrode AEexposed by the opening OP. The peripheral region NPXA corresponds to aregion excluding the display area DD-DA in the display area DD-DA (referto FIG. 1A).

A hole control layer HCL may be disposed throughout the emission regionPXA and the peripheral region NPXA. The hole control layer HCL mayinclude a hole transport layer and may further include a hole injectionlayer. An emission layer EML is disposed on the hole control layer HCL.The emission layer EML may be disposed in a region corresponding to theopening OP. For example, the emission layer EML may be formed separatelyin each of the emission regions PXA-R, PXA-G1, PXA-G2, and PXA-B.

An electron control layer ECL is disposed on the emission layer EML. Theelectron control layer ECL may include an electron transport layer andmay further include an electron injection layer. A second electrode CEis disposed on the electron control layer ECL.

The upper insulating layer TFL is disposed on the second electrode CE.The upper insulating layer TFL may include thin films. In an embodiment,the upper insulating layer TFL may include a capping layer and a thinencapsulation layer disposed on the capping layer.

FIG. 6A is a schematic cross-sectional view corresponding to theemission region PXA-1 of the first group. FIG. 6B is a schematiccross-sectional view corresponding to the emission region PXA-2 of thesecond group. A difference between cross sectional stacked structures ofa stacked structure on the emission region PXA-1 of the first group anda stacked structure on the emission region PXA-2 of the second groupwill be described with reference to FIGS. 6A and 6B.

Referring to FIGS. 6A and 6B, first electrodes AE-R, AE-B, and AE-G1respectively corresponding to the first color emission region PXA-R, thesecond color emission region PXA-B, and the third color emission regionPXA-G1 are disposed on the circuit device layer DP-CL. The openings OPof the pixel defining layer PDL corresponding to the first coloremission region PXA-R, the second color emission region PXA-B, and thethird color emission region PXA-G1 are defined in the pixel defininglayer PDL. FIGS. 6A and 6B illustrate only some components of the lightemitting element OLED to avoid repetitive illustrations. Refer to FIG. 5for a detailed structure of the light emitting element OLED.

The upper insulating layer TFL may include a first encapsulationinorganic layer IOL1, an organic layer OL, and a second encapsulationinorganic layer IOL2. This three-layer structure may be defined as thethin-film encapsulation layer.

The input sensor ISL may be directly disposed on the upper insulatinglayer TFL. The input sensor ISL may include at least one insulatinglayer IS-IL1, IS-IL2, and IS-IL3, the organic pattern ORP, and the meshline MSL. The insulating layers IS-IL1, IS-IL2, and IS-IL3 of the inputsensor ISL include at least one inorganic layer. FIG. 6A illustrates, asan example, the input sensor ISL in which each of the first and secondinsulating layers IS-IL1 and IS-IL2 is an inorganic layer and the thirdinsulating layer IS-IL3 is an organic layer. In an embodiment, the thirdinsulating layer IS-IL3 may be an inorganic layer.

As illustrated in FIG. 6A, the organic pattern ORP may be disposedbetween the first insulating layer IS-IL1 and the second insulatinglayer IS-IL2. The organic pattern ORP may extend the viewing angle. Incase that the display device DD is operated in the above-describedsecond operation mode, light generated in the emission region PXA-1 ofthe first group is provided with a narrow viewing angle while lightgenerated in the emission region PXA-2 of the second group is providedwith a wide viewing angle. A detailed description thereof will bedescribed with reference to FIGS. 8A to 8C.

The mesh line MSL may be directly disposed on the third insulating layerIS-IL3. Although not shown separately, the bridge pattern BR (refer toFIG. 3 ) may be disposed between the second insulating layer IS-IL2 andthe third insulating layer IS-IL3. In an embodiment, the input sensorISL may further include an inorganic layer directly covering (oroverlapping) the mesh line MSL.

The mesh line MSL may have a multilayer structure. The mesh line MSL mayinclude a first layer CL1, a second layer CL2, and a third layer CL3.The first layer CL1 may have a higher bonding rate with respect to theinsulating layer than that of the second layer CL2, the second layer CL2may have a higher conductivity than those of the first and third layersCL1 and CL3, and the third layer CL3 may have a lower reflectance withrespect to external light than that of the second layer CL2. Forexample, the mesh line MSL may have a multilayer structure in whichtitanium/aluminum/titanium are stacked in the order.

However, the disclosure is not limited thereto, and the multilayeredconductive layer may include at least two of transparent conductivelayers and metal layers. The multilayered conductive layer may includemetal layers including different metals. The transparent conductivelayer may include indium tin oxide (ITO), indium zinc oxide (IZO), zincoxide (ZnO), indium tin zinc oxide (ITZO),poly(3,4-ethylenedioxythiophene) (PEDOT), metal nanowires, and graphene.The metal layer may include molybdenum, silver, titanium, copper,aluminum, and alloys thereof.

In an embodiment, the mesh line MSL may be omitted. In case that themesh line MSL is omitted, the external input may not be detected, butthe organic pattern ORP may still be disposed for function of an opticalpattern.

As illustrated in FIGS. 6A and 6B, the optical control layer PPL may bedirectly disposed on the input sensor ISL. The optical control layer PPLmay include the organic layer PPL-1, the light blocking pattern BM, anda planarization layer PPL-2. In an embodiment, the planarization layerPPL-2 may be omitted, and an adhesive layer PSA bonding the window WP(refer to FIG. 2 ) may replace the planarization layer PPL-2.

An opening PPL-OP corresponding to the emission region PXA-2 of thesecond group is defined in the organic layer PPL-1. The organic layerPPL-1 may cover (or overlap) the mesh line MSL. The organic layer PPL-1may include an acrylate-based resin, an epoxide-based resin, asiloxane-based resin, a polyimide-based resin, or a mixture thereof. Theorganic layer PPL-1 may include particles having a low refractive index.The organic layer PPL-1 may include hollow silica particles.

As illustrated in FIG. 6B, the organic layer PPL-1 may include aninclined surface ICS defining the opening PPL-OP. An angle Θ formedbetween the inclined surface ICS and a top surface of the thirdinsulating layer IS-IL3 exposed to the opening PPL-OP may have an obtuseangle. The angle Θ may be greater than about 90° and less than about135°.

The light blocking pattern BM is disposed on the organic layer PPL-1,and the light blocking openings BM-OP are defined in the light blockingpattern BM. The light blocking pattern BM may be a pattern having ablack color and may include a black coloring agent. The black coloringagent may include a black dye and a black pigment. The black coloringagent may include carbon black, a metal such as chromium, or an oxidethereof. A material used in a process of patterning the light blockingpattern BM (especially, KOH which is a component of a developer) mayreact with the mesh line MSL (especially, aluminum), and the organiclayer PPL-1 serves as a barrier layer to prevent this reaction.

The planarization layer PPL-2 fills the opening PPL-OP. Theplanarization layer PPL-2 may have a greater refractive index than thatof the organic layer PPL-1. The planarization layer PPL-2 may have arefractive index greater than that of the organic layer PPL-1 by about0.5 or more. The refractive index of the organic layer PPL-1 may beabout 1.4 to about 1.6, and the refractive index of the planarizationlayer PPL-2 may be about 1.6 to about 1.9.

The planarization layer PPL-2 may include an acrylate-based resin, anepoxide-based resin, a siloxane-based resin, a polyimide-based resin, azirconium and hafnium acrylate-based resin, brominated aromaticacrylate-based resin, or a mixture thereof. The planarization layerPPL-2 may include particles having a high refractive index. Theparticles having the high refractive index may be zirconia (ZrO₂),titania (TiO₂), silica (SiO₂), or a mixture thereof, and a particlediameter thereof may be about 100 nm or less.

Source light generated from the light emitting element may be reflectedfrom the inclined surface ICS and then may be provided in a verticaldirection, and thus light concentration efficiency may be improved.Total reflection may be caused by a difference in refractive indexbetween the planarization layer PPL-2 and the organic layer PPL-1, andthus light concentration efficiency may be improved. The light blockingpattern BM may prevent color mixing of adjacent pixels.

In case that the display device DD operates in the above-described firstoperation mode, the light generated in the emission regions PXA-2 of thesecond group is provided at a narrow viewing angle, and luminance of thelight generated based on an emission region increases. Additionaldescription thereof will be made with reference to FIG. 7 .

The display device DD operating in the first operation mode may be usedfor a specific purpose. For example, the display device DD operating ina personal use mode may provide an image only to the user and preventinformation of the image from leaking to neighbors adjacent to the user.

FIG. 7 is a graph showing a front luminance depending on a thickness ofan organic layer according to an embodiment. FIG. 8A is a graph showingluminance for each of viewing angles of display devices according toComparative Examples and display devices according to Embodiments. FIG.8B is a graph showing color deviations for each of viewing angles of adisplay device according to a material of the insulating layer IS-IL3.FIG. 8C is a graph showing color deviations according to viewing anglesof display devices according to Comparative Examples and display devicesaccording to Embodiments. FIGS. 7 to 8B illustrate simulation results,and FIG. 8C illustrates actual measurement values measured in a displaydevice modeled in the same manner as the simulation.

FIG. 7 illustrates front luminance of light generated from the emissionregion PXA-2 of a second group. Unlike the emission region PXA-2described with reference to FIG. 6B, the front luminance of lightgenerated in the emission region in which the opening PPL-OP is notdefined in the organic layer PPL-1 is set to about 100.

According to a left graph of FIG. 7 , in case that the opening PPL-OP isdefined in the organic layer PPL-1 of about 1.9 µm, it may be seen thatthe front luminance is increased by about 12%. According to a middlegraph of FIG. 7 , in case that the opening PPL-OP is defined in theorganic layer PPL-1 of about 2.25 µm, it may be seen that the frontsurface luminance is increased by about 13%. According to a right graphof FIG. 7 , in case that the opening PPL-OP is defined in the organiclayer PPL-1 of about 2.6 µm, it may be seen that the front surfaceluminance is increased by about 15%.

It may be seen that, as the thickness of the organic layer PPL-1increases in a given range, the amount of light reflected from theinclined surface ICS (refer to FIG. 6B) increases, and thus lightconcentration efficiency is improved. Unlike a general display device,in the first operation mode, the emission region PXA-1 of the firstgroup is deactivated, and the opening PPL-OP of the organic layer PPL-1may compensate for the lowered image brightness due to a decrease in thenumber of activated pixels.

FIG. 8A illustrates white luminance depending on the viewing anglesshown in the emission region PXA-1 of the first group. FIG. 8Aillustrates luminance of mixed lights generated from a first coloremission region PXA-R, a second color emission region PXA-B, and twothird color emission regions PXA-G1 and PXA-G2 illustrated in FIGS. 4Ato 4C.

A first graph G1 is an amount of change in white luminance according toa viewing angle in a display device according to Comparative Example 1.The display device according to Comparative Example 1 does not includethe organic pattern ORP compared to the emission region PXA-1 of thefirst group illustrated in FIG. 6A and includes the third insulatinglayer IS-IL3 that is an inorganic layer. A second graph G2 is a changein white luminance according to a viewing angle in a display deviceaccording to Comparative Example 2. The display device according toComparative Example 2 does not include the organic pattern ORP comparedto the emission region PXA-1 of the first group illustrated in FIG. 6A.

The display device according to Comparative Example 2 includes a siliconnitride layer having a thickness of about 500 Å as the first insulatinglayer IS-IL1, a silicon nitride layer having a thickness of about 1,500Å as the second insulating layer IS-IL2, an acrylate layer having athickness of about 25,000 Å as the third insulating layer IS-IL3, and anacrylate layer having a thickness of about 17,500 Å as the organic layerPPL-1. The display device according to Comparative Example 1 includes asilicon nitride layer having a thickness of about 3,300 Å as the thirdinsulating layer IS-IL3 instead of an acrylate layer having a thicknessof about 25,000 Å.

Third graph to tenth graph G3 to G10 are the amount of change in whiteluminance according to viewing angles shown in display devices accordingto the embodiment. A display device of the third graph G3 furtherincludes an acrylate organic pattern ORP having a thickness of about15,000 Å disposed between the first insulating layer IS-IL1 and thesecond insulating layer IS-IL2 compared to the display device accordingto Comparative Example 2 and includes a silicon nitride layer having athickness of about 3,300 Å as the third insulating layer IS-IL3.

A display device of the fourth graph G4 further includes an acrylateorganic pattern ORP having a thickness of about 15,000 Å compared to thedisplay device according to Comparative Example 2 and includes anacrylate layer having a thickness of about 1,000 Å as the thirdinsulating layer IS-IL3. A display device of the fifth graph G5 furtherincludes an acrylate organic pattern ORP having a thickness of about15,000 Å compared to the display device according to Comparative Example2 and includes an acrylate layer having a thickness of about 2,000 Å asthe third insulating layer IS-IL3. A display device of the sixth graphG6 further includes an acrylate organic pattern ORP having a thicknessof about 15,000 Å compared to the display device according toComparative Example 2 and includes an acrylate layer having a thicknessof about 3,000 Å as the third insulating layer IS-IL3. Substantially,display devices of the fourth to sixth graphs G4 to G6 and the displaydevice shown in FIG. 6A have the same stacked structure and aredifferent from one another only in the thicknesses of the thirdinsulating layer IS-IL3.

A display device of the seventh graph G7 further includes an acrylateorganic pattern ORP having a thickness of 30,000 Å disposed between thefirst insulating layer IS-IL1 and the second insulating layer IS-IL2compared to the display device according to Comparative Example 2 andincludes a silicon nitride layer having a thickness of about 3,300 Å asthe third insulating layer IS-IL3.

A display device of the eighth graph G8 further includes an acrylateorganic pattern ORP having a thickness of 30,000 Å compared to thedisplay device according to Comparative Example 2 and includes anacrylate layer having a thickness of about 1,000 Å as the thirdinsulating layer IS-IL3. A display device of the ninth graph G9 furtherincludes an acrylate organic pattern ORP having a thickness of about30,000 Å compared to the display device according to Comparative Example2 and includes an acrylate layer having a thickness of about 2,000 Å asthe third insulating layer IS-IL3. A display device of the tenth graphG10 further includes an acrylate organic pattern ORP having a thicknessof about 30,000 Å compared to the display device according toComparative Example 2 and includes an acrylate layer having a thicknessof about 3,000 Å as the third insulating layer IS-IL3. Substantially,the display devices of the seventh to tenth graphs G7 to G10 and thedisplay device shown in FIG. 6A have the same stacked structure and aredifferent from one another only in the thicknesses of the thirdinsulating layer IS-IL3.

Referring to the first to tenth graphs G1 to G10, it may be seen thatthe luminance of a white image depending on the viewing angle is notaffected by the stacked structure of the insulating layer and thematerial of the insulating layer. Because the first to tenth graphs G1to G10 in FIG. 8A have almost the same rate of change of white luminancedepending on the viewing angle, the first to tenth graphs G1 to G10 areillustrated as one graph.

A first graph G11 illustrated in FIG. 8B represents a color deviationΔu′v′ depending on a viewing angle shown in the display device accordingto Comparative Example 1 described in FIG. 8A. A second graph G12represents a color deviation Δu′v′ depending on a viewing angle shown inthe display device according to Comparative Example 2 described in FIG.8A.

It may be seen that the display device according to Comparative Example2 has an increased color deviation at about 30 ° to about 60° comparedto the display device according to Comparative Example 1. This isbecause the thickness of the third insulating layer IS-IL3 is increasedand thus the resonance structure is changed.

A first graph G1-1 and a second graph G1-2 shown in FIG. 8C illustratecolor deviations Δu′v′ depending on viewing angles measured in each ofdisplay devices modeled in the same manner as the display deviceaccording to Comparative Example 1 described in FIG. 8A.

A third graph to a fifth graph G2-1 to G2-3 represent color deviationsΔu′v′ depending on viewing angles measured in the display deviceaccording to the embodiment. A display device of the third graph G2-1further includes an acrylate organic pattern ORP having a thickness ofabout 12,000 Å compared to the display device according to ComparativeExample 2. A display device of the fourth graph G2-2 further includes anacrylate organic pattern ORP having a thickness of about 22,000 Åcompared to the display device according to Comparative Example 2. Adisplay device of the fifth graph G2-3 further includes an acrylateorganic pattern ORP having a thickness of about 33,000 Å compared to thedisplay device according to Comparative Example 2. The display devicesof the third to fifth graphs G2-1 to G2-3 and the display devices of thefirst graph G1-1 and the second graph G1-2 have the same thicknesses andmaterials in the third insulating layers IS-IL3.

According to the third to fifth graphs G2-1 to G2-3, it may be seen thatthe color deviation is reduced in a range of about 30 ° to about 60°compared to the first graph G1-1 and the second graph G1-2. Unlike thecomparison result of the first graph G11 and the second graph G1-2referenced in FIG. 8B, the reduced color deviation in the third to fifthgraphs G2-1 to G2-3 is because of an organic pattern ORP having arelatively great thickness. It is assumed that the organic pattern ORPincreases the viewing angle.

In case that the first graph G1-1, the second graph G1-2, and the thirdto fifth graphs G2-1 to G2-3 are reviewed in more detail, they are shownin Tables 1 to 4 below. Values in Table 1 were measured based on a whiteimage, values in Table 2 were measured based on a red image, values inTable 3 were measured based on a green image, and values in Table 4 weremeasured based on a blue image.

TABLE 1 G1-1 G1-2 G2-1 G2-2 G2-3 Front luminance (cd/m²) 428.3 424.4429.4 424.4 424.8 Luminance amount at 45 ° to front luminance (%) 50 4948 51 50 Luminance amount at 60 ° to front luminance (%) 30 30 29 29 2545° Color deviation (Δu′v′) 0.016 0.014 0.014 0.012 0.013 60° Colordeviation (Δu′v′) 0.024 0.024 0.023 0.021 0.026

TABLE 2 G1-1 G1-2 G2-1 G2-2 G2-3 Front luminance (cd/m²) 123.4 120.9124.3 120.7 121.6 Luminance amount at 45 ° to front luminance (%) 50 5048 51 51 Luminance amount at 60 ° to front luminance (%) 26 26 25 26 2145° Color deviation (Δu′v′) 0.032 0.034 0.032 0.031 0.032 60° Colordeviation (Δu′v′) 0.038 0.039 0.038 0.038 0.039

TABLE 3 G1-1 G1-2 G2-1 G2-2 G2-3 Front luminance (cd/m²) 376.9 368.4373.2 367 368.5 Luminance amount at 45 ° to front luminance (%) 51 49 4851 50 Luminance amount at 60 ° to front luminance (%) 32 31 30 30 27 45°Color deviation (Δu′v′) 0.016 0.015 0.012 0.014 0.015 60° Colordeviation (Δu′v′) 0.016 0.015 0.012 0.014 0.015

TABLE 4 G1-1 G1-2 G2-1 G2-2 G2-3 Front luminance (cd/m²) 34.63 34.7434.61 34.01 34.66 Luminance amount at 45 ° to front luminance (%) 46 4545 45 46 Luminance amount at 60 ° to front luminance (%) 29 29 27 27 2445° Color deviation (Δu′v′) 0.020 0.021 0.017 0.018 0.018 60° Colordeviation (Δu′v′) 0.020 0.021 0.019 0.021 0.021

Referring to FIG. 8C and Tables 1 to 4, it may be seen that the displaydevice according to the embodiment has the front luminance similar tothat of the display device according to Comparative Example, and theside luminance is reduced to a similar level. In contrast, it may beseen that the display device according to the embodiment has the reducedcolor deviation depending on the viewing angle compared to the displaydevice according to Comparative Example.

In the display device according to the embodiment, it may be seen thatin case that the thickness of the organic pattern ORP increases andbecomes larger than the reference value, a luminance amount at 60°relative to the front luminance decreases relatively much. Inconsideration of the result of the fifth graph G2-3, the thickness ofthe organic pattern ORP may be about 30,000 Å or less.

FIG. 9 is a schematic cross-sectional view taken along line II-II′ ofFIG. 4B of a display device according to an embodiment of the presentdisclosure. FIG. 10 is a schematic cross-sectional taken along line I-I′of FIG. 4A of a display device according to an embodiment of the presentdisclosure. Hereinafter, a detailed description of the sameconfiguration as the configuration described with reference to FIGS. 1to 8C will be omitted.

Referring to FIG. 9 , a position of the light blocking pattern BM may bechanged compared to the embodiment illustrated in FIG. 7 . According tothe embodiment, the light blocking pattern BM may be disposed on theplanarization layer PPL-2. In an embodiment, an additional lightblocking pattern may be disposed on the planarization layer PPL-2.

Referring to FIG. 10 , an opening PPL-OP corresponding to the emissionregion PXA-1 of the first group may be further defined in the organiclayer PPL-1. In a manufacturing process of the display device, in casethat a pre-organic layer is formed on the third insulating layer IS-IL3,the pre-organic layer before curing has a thinner thickness in a regionwhere the organic pattern ORP is disposed. This is because a liquidorganic material has characteristics of flattening a stepped part. Thestepped part is formed between the first area PA1 (refer to FIGS. 4A to4C) and the second area PA2 (refer to FIGS. 4A to 4C) by the organicpattern ORP.

Accordingly, a depth D2 of the opening PPL-OP corresponding to theemission region PXA-1 of the first group is less than a depth D1 of theopening PPL-OP corresponding to the emission region PXA-2 of the secondgroup shown in FIG. 6B. As a result, the light concentration efficiencyof the emission region PXA-1 of the first group is relatively lower thanthat of the emission region PXA-2 of the second group.

According to the above, in the first operation mode, the display devicemay provide the image having the narrow viewing angle. The lightprovided from the pixels of the second group may be condensed by theorganic layer, and the user may receive the source light of a relativelyhigh luminance from the pixels of the second group.

In the second operation mode, the display device may provide the imagehaving the wide viewing angle. The display device in the secondoperation mode may provide the light with the color deviation reduced bythe organic pattern at the wide viewing angle.

While the disclosure has been described with reference to embodimentsthereof, it will be apparent to those of ordinary skill in the art thatvarious changes and modifications may be made thereto without departingfrom the spirit and scope of the disclosure.

Therefore, the disclosed subject matter should not be limited to anysingle embodiment described herein, and the scope of the claimedinvention shall be determined according to the attached claims.

What is claimed is:
 1. A display device comprising: a display panelincluding: a base layer including a peripheral region and an emissionregion; an organic light emitting element disposed on the base layer,and including: a first electrode; a light emitting pattern disposed onthe first electrode; and a second electrode disposed on the lightemitting pattern; and a thin encapsulation layer overlapping the organiclight emitting element; an input sensor to detect an external input; afirst organic layer disposed on the thin encapsulation layer, anddefining a first opening corresponding to the emission region; and asecond organic layer filling the first opening, wherein the input sensorincludes a conductive mesh line overlapping the peripheral region anddefining a sensor opening corresponding to the emission region, and theconductive mesh line is disposed on the thin encapsulation layer and iscovered by the first organic layer, a refractive index of the firstorganic layer is different from a refractive index of the second organiclayer.
 2. The display device of claim 1, further comprising: at leastone insulating layer disposed between the display panel and the firstorganic layer, wherein the display panel includes: a first areaincluding a first peripheral region and a first emission region of apixel of a first group; and a second area including a second peripheralregion and a second emission region of a pixel of a second group, and afirst stacked structure is disposed on the display panel and overlapsthe first area, a second stacked structure is disposed on the displaypanel and overlaps the second area, a cross section of the first stackedstructure and a cross section of the second stacked structure aredifferent from each other, and the first opening corresponds to thesecond emission region of the pixel of the second group.
 3. The displaydevice of claim 2, further comprising: an organic pattern disposed onthe display panel, overlapping the first area, and not overlapping thesecond area.
 4. The display device of claim 3, wherein the thinencapsulation layer includes: a first encapsulation inorganic layer; anorganic layer disposed on the first encapsulation inorganic layer; and asecond encapsulation inorganic layer disposed on the organic layer. 5.The display device of claim 4, further comprising: at least oneinorganic layer disposed between the second encapsulation inorganiclayer and the organic pattern.
 6. The display device of claim 3, whereina thickness of the organic pattern is about 30,000 Å or less.
 7. Thedisplay device of claim 3, wherein the at least one insulating layerincludes: a first inorganic layer; a second inorganic layer disposed onthe first inorganic layer; and an organic layer disposed on the secondinorganic layer, and the organic pattern is disposed between the firstinorganic layer and the second inorganic layer.
 8. The display device ofclaim 2, wherein the display panel deactivates the pixel of the firstgroup and activates the pixel of the second group in a first operationmode, and the display panel activates the pixel of the first group andthe pixel of the second group in a second operation mode.
 9. The displaydevice of claim 2, wherein the pixel of the first group includes a firstcolor pixel, a second color pixel, and a third color pixel that generatedifferent lights from one another, and the pixel of the second groupincludes a first color pixel, a second color pixel, and a third colorpixel that generate different lights from one another.
 10. The displaydevice of claim 9, wherein each of the first area and the second areaincludes a plurality of unit regions, the first color pixel, the secondcolor pixel, and the third color pixel in the first group and the firstcolor pixel, the second color pixel, and the third color pixel in thesecond group are disposed in corresponding ones of the plurality of unitregions, and the first color pixel, the second color pixel, and thethird color pixel in the first group and the first color pixel, thesecond color pixel, and the third color pixel in the second group have asame arrangement.
 11. The display device of claim 1, further comprising:a light blocking pattern disposed on the first organic layer, wherein afirst light blocking opening corresponding to the first opening isdisposed in the light blocking pattern.
 12. The display device of claim11, wherein a refractive index of the second organic layer is greaterthan a refractive index of the first organic layer.
 13. The displaydevice of claim 12, wherein the second organic layer overlaps the lightblocking pattern.
 14. The display device of claim 2, wherein the firstorganic layer includes an inclined surface defining the first opening,and the inclined surface and an upper surface of the at least oneinsulating layer exposed to the first opening meet at an obtuse angle.15. The display device of claim 2, wherein the input sensor includes aconductive mesh line overlapping the peripheral region and defining asensor opening corresponding to the emission region, and the conductivemesh line is disposed on the at least one insulating layer and overlapsthe first organic layer.
 16. The display device of claim 15, wherein theat least one insulating layer includes a first inorganic layer and asecond inorganic layer disposed on the first inorganic layer, theconductive mesh line includes a first sensing electrode and sensingpatterns insulated from the first sensing electrode, the input sensorincludes a bridge pattern which electrically connects the sensingpatterns and overlaps the first sensing electrode, and the bridgepattern is disposed between the first inorganic layer and the secondinorganic layer.
 17. The display device of claim 1, wherein the firstorganic layer spaced apart from the thin encapsulation layer by at leastone insulating layer that is disposed between the first organic layerand the thin encapsulation layer.
 18. The display device of claim 1,wherein the first organic layer includes an organic material, and thefirst opening does not include the organic material.
 19. The displaydevice of claim 2, wherein the pixel of the first group and the pixel ofthe second group have a same pixel arrangement.
 20. A display devicecomprising: a display panel including: a base layer including aperipheral region and emission regions; an organic light emittingelement disposed on the base layer, and including: a first electrode; alight emitting pattern disposed on the first electrode; and a secondelectrode disposed on the light emitting pattern; and a thinencapsulation layer overlapping the organic light emitting element; aninput sensor disposed on the display panel; and an optical control layerdisposed on the input sensor, wherein the input sensor includes: anorganic pattern disposed on the display panel; a conductive mesh linedisposed on the display panel and the organic pattern, the conductivemesh line defining a plurality of sensor openings corresponding to theemission regions; and a first organic layer overlapping the conductivemesh line, and the optical control layer includes a second organic layeroverlapping the first organic layer, and having a higher refractiveindex than a refractive index of the first organic layer.
 21. Thedisplay device of claim 20, further comprising: at least one insulatinglayer disposed on the display panel.
 22. The display device of claim 20,further comprising: a light blocking pattern disposed on the firstorganic layer, the light blocking pattern including light blockingopenings overlapping the emission regions.